US1715695A - Derusting ferrous metals - Google Patents
Derusting ferrous metals Download PDFInfo
- Publication number
- US1715695A US1715695A US244042A US24404227A US1715695A US 1715695 A US1715695 A US 1715695A US 244042 A US244042 A US 244042A US 24404227 A US24404227 A US 24404227A US 1715695 A US1715695 A US 1715695A
- Authority
- US
- United States
- Prior art keywords
- pressure
- derusting
- ferrous metals
- rusting
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/083—Iron or steel solutions containing H3PO4
Definitions
- a steel container with a manhole opening the use of an autoclave-or closed vessel cawas made strong enough to withstand high pable ofavithstanding heat and pressure for pressure.
- This container was furnished rust-proofing and de-rusting ferrous metals. with a pressure gauge, a safety valve and in "Vhat I claim and desire to secure by Letv 15 addition a soft metal plug which would melt ters Patent is if the temperature rose too high, and so re 1. Process of de-rusting and removing lease the pressure, and finally a signal whisscale from; ferrous articles consisting in tle which whistled an alarm when the pres treating them with phosphoric acid so dilute sure inside rose to the predetermined point.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Chemical Treatment Of Metals (AREA)
Description
Patented June 4, I I I I UNITED STATES PATENT OFFICE.-
WILLIAM nowm COLE, or rams, rnmcn nnnusrme rnimous METALS.
No Drawing. Original application filed September 20, 1927, Serial No. 220,840; and in Great Britain August 22, 1927. Diyidcd and this application filed December 31, 1927. Serial No. 244,042:
This specification is a division of my specappearance very clean and free from rust. ification Serial No. 220,840, filed th Sep- I do not confine myself to the use of tcmber, 1927. dilute phosphoric acid for de-rusting as de- I have found that by treating rusted iron scribed above, as I find that my high pres- 5 or steel articles with dilute phosphoric acid, sure process gives excellent results with other in an autoclave, at high temperature and ingredients, for the compositions of which I'- pressure, the ruston the said article. is redo not claim. priority, but merely desire, in 40 moved. this respect, to be protected in the use of my The following example will further illushereinbefore described method of treatment 10 trate the nature of the invention. under pressure and high temperature, and
A steel container with a manhole opening the use of an autoclave-or closed vessel cawas made strong enough to withstand high pable ofavithstanding heat and pressure for pressure. This container was furnished rust-proofing and de-rusting ferrous metals. with a pressure gauge, a safety valve and in "Vhat I claim and desire to secure by Letv 15 addition a soft metal plug which would melt ters Patent is if the temperature rose too high, and so re 1. Process of de-rusting and removing lease the pressure, and finally a signal whisscale from; ferrous articles consisting in tle which whistled an alarm when the pres treating them with phosphoric acid so dilute sure inside rose to the predetermined point. that no'coating is left on thearticles treated 20 This whistle alarm was made to be ad ustaina closed vessel, said treatment being carblc for any pressure wanted. In, one exried out at boiling temperature and under periment, after introducing the ingredients pressure greater than atmospheric pressure. and steel and iron pieces to be de-rusted,- 2. Process of de-rusting and removing the pressure arranged for was about 50 scale from ferrous articles consistin in 25 pounds per square inch, the heating had; treating them with phos horic aci so only to be used for a period of about ten dilute that no coating is le on the articles minutes before the whistle gave the alarm treated in a closed vessel, said treatment beand thesource of heat wasturncd off. After ing carried out at a boiling temperature and the pressure vessel had cooled suificiently-to under a pressureof-about 50 pounds per 30 enable it to be opened without'danger, which square inch. i
in this case was about 10 minutes, the auto- In testimony whereof I aflix my signaclave was opened and it was ascertained ture. that the iron and steel pieces treated were in WILLIAM HOWARD COLE.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB24658/28A GB306604A (en) | 1927-08-22 | 1927-08-22 | An improved process for removing rust, scale, dirt, or grease from iron and steel articles |
US244042A US1715695A (en) | 1927-08-22 | 1927-12-31 | Derusting ferrous metals |
FR648106D FR648106A (en) | 1927-08-22 | 1928-02-02 | Process for preserving metals and in particular iron and steel from rust, and for removing rust from iron and steel objects |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2205327A GB298328A (en) | 1927-08-22 | 1927-08-22 | Improvements in processes for proofing iron and steel against rust |
US22084027A | 1927-09-20 | 1927-09-20 | |
US244042A US1715695A (en) | 1927-08-22 | 1927-12-31 | Derusting ferrous metals |
Publications (1)
Publication Number | Publication Date |
---|---|
US1715695A true US1715695A (en) | 1929-06-04 |
Family
ID=27258080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US244042A Expired - Lifetime US1715695A (en) | 1927-08-22 | 1927-12-31 | Derusting ferrous metals |
Country Status (3)
Country | Link |
---|---|
US (1) | US1715695A (en) |
FR (1) | FR648106A (en) |
GB (1) | GB306604A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3338745A (en) * | 1963-07-03 | 1967-08-29 | Grace W R & Co | Method for cleaning evaporator tubes |
US3375149A (en) * | 1948-04-28 | 1968-03-26 | Atomic Energy Commission Usa | Plutonium etching process |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2965523A (en) * | 1957-02-12 | 1960-12-20 | Dow Chemical Co | Scale removal from ferrous metal surfaces |
-
1927
- 1927-08-22 GB GB24658/28A patent/GB306604A/en not_active Expired
- 1927-12-31 US US244042A patent/US1715695A/en not_active Expired - Lifetime
-
1928
- 1928-02-02 FR FR648106D patent/FR648106A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3375149A (en) * | 1948-04-28 | 1968-03-26 | Atomic Energy Commission Usa | Plutonium etching process |
US3338745A (en) * | 1963-07-03 | 1967-08-29 | Grace W R & Co | Method for cleaning evaporator tubes |
Also Published As
Publication number | Publication date |
---|---|
FR648106A (en) | 1928-12-05 |
GB306604A (en) | 1929-02-22 |
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